CHAPTER 6 DETAILED RULES FOR EXECUTION INSTRUCTIONS
6.68 RETI (RETurn from Interrupt)
Return the contents of PS and PC saved in the stack. Return PS and PC to the state before interrupt.
■RETI (RETurn from Interrupt)
Operation
(PS) ← ((SP)), (PC) ← ((SP + 2)) (Word transfer)
(SP) ← (SP) + 4 (Word addition)
Assembler format
RETI
Condition code (CCR)
N | Z | V | C |
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+ | + | + | + |
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+: Changed by executing instruction
N:Become to the saved value of N.
Z:Become to the saved value of Z.
V:Become to the saved value of V.
C:Become to the saved value of C.
Number of execution cycles: 8
Byte count: 1
OP code: 30
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